Created by Felix4067 on October 17, 2011
Step 1: Layer the zucchini, summer squash, mushrooms and onion in a glass casserole dish.
Step 2: Drizzle olive oil over the top; sprinkle with Italian seasoning.
Step 3: Microwave on high, covered, for 6 minutes.
Step 4: Sprinkle feta cheese over top of casserole; microwave, uncovered, an additional 2 minutes.